This page explains how Allen McDermott (USATT# 8199)'s rating went from 1846 to 1845 at the 1999 Spring CO Civil War Close held on - 7 Mar 1999. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.